insulation under a thatch


Postby archedwarrior » Sat Sep 18, 2010 7:57 pm

Hello all you wise people. I am in the process of renovating a detached rural house with a thatched roof and I need loads of advice please. For starters, can anyone tell me about insulation underneath a thatched roof?

I have removed all internal partitions and ceiling on the first floor to create a huge open plan space with a cathedral ceiling. All supported with oak 'A' frames. At the moment the underside of the thatch is exposed and there is no felt.

So I need a layer of really effective insulation. I am planning on using Thinsulate stapled across the rafters. Then a layer of batons followed by plasterboard.

So here come the questions:

1) is Thinsulate sufficient on its own or should I also use something like Celutex as well? (the rafers are not very deep so it would be difficult to get Celutex in there).

2) Should I get some roofing felt up too?

3) Should I use fire-proof plasterboard?

Thanks people. :lol:
archedwarrior
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Postby welsh brickie » Tue Sep 21, 2010 11:51 am

I would use spraybond insulation
Its fireproof,waterproof,and moulds to any gap making it seamless
and offers high u value insulation
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Postby windowsill » Mon Sep 27, 2010 8:29 am

Seconding that. It's easy to get everywhere...used it myself some time ago...
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Postby archedwarrior » Mon Sep 27, 2010 7:54 pm

Thanks Welshbrickie and windowsill, that is really interesting. I have never heard of this product and all I can find on the net is an adhesive. Is Spraybond something you spray underneath the thatch? Do you know who makes it? Can I put plasterboard underneath? I would really like to know more.
archedwarrior
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Postby archedwarrior » Mon Sep 27, 2010 7:55 pm

...also, is Spraybond microporous? I understand that thatch has to be able to breathe?!
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Joined: Sat Sep 18, 2010 6:58 pm


Postby welsh brickie » Tue Sep 28, 2010 3:39 pm

Google "expandingfoamkits.co.uk" for some more information
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Joined: Sat Apr 12, 2008 7:54 am


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